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#!/usr/bin/python
# Usage (the graphviz package must be installed in your distribution)
# ./scripts/graph-depends [package-name] > test.dot
# dot -Tpdf test.dot -o test.pdf
#
# With no arguments, graph-depends will draw a complete graph of
# dependencies for the current configuration. With an argument,
# graph-depends will draw a graph of dependencies for the given
# package name.
#
# Limitations
#
# * Some packages have dependencies that depend on the Buildroot
# configuration. For example, many packages have a dependency on
# openssl if openssl has been enabled. This tool will graph the
# dependencies as they are with the current Buildroot
# configuration.
#
# * The X.org package definitions are only included when
# BR2_PACKAGE_XORG7 is enabled, so if this option is not enabled,
# it isn't possible to graph the dependencies of X.org stack
# components.
#
# Copyright (C) 2010 Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
import sys
import subprocess
# In FULL_MODE, we draw the full dependency graph for all selected
# packages
FULL_MODE = 1
# In PKG_MODE, we only draw the dependency graph for a given package
PKG_MODE = 2
mode = 0
if len(sys.argv) == 1:
mode = FULL_MODE
elif len(sys.argv) == 2:
mode = PKG_MODE
rootpkg = sys.argv[1]
else:
print "Usage: graph-depends [package-name]"
sys.exit(1)
allpkgs = []
unknownpkgs = []
# Execute the "make show-targets" command to get the list of the main
# Buildroot TARGETS and return it formatted as a Python list. This
# list is used as the starting point for full dependency graphs
def get_targets():
sys.stderr.write("Getting targets\n")
cmd = ["make", "-s", "show-targets"]
p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
output = p.communicate()[0].strip()
if p.returncode != 0:
return None
if output == '':
return []
return output.split(' ')
# Execute the "make <pkg>-show-depends" command to get the list of
# dependencies of a given package, and return the list of dependencies
# formatted as a Python list.
def get_depends(pkg):
sys.stderr.write("Getting dependencies for %s\n" % pkg)
cmd = ["make", "-s", "%s-show-depends" % pkg]
p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
output = p.communicate()[0].strip()
if p.returncode != 0:
return None
if output == '':
return []
return output.split(' ')
# Recursive function that builds the tree of dependencies for a given
# package. The dependencies are built in a list called 'dependencies',
# which contains tuples of the form (pkg1 ->
# pkg2_on_which_pkg1_depends) and the function finally returns this
# list.
def get_all_depends(pkg):
dependencies = []
# We already have the dependencies for this package
if pkg in allpkgs:
return
allpkgs.append(pkg)
depends = get_depends(pkg)
# We couldn't get the dependencies of this package, because it
# doesn't use the generic or autotools infrastructure. Add it to
# unknownpkgs so that it is later rendered in red color to warn
# the user.
if depends == None:
unknownpkgs.append(pkg)
return
# This package has no dependency.
if depends == []:
return
# Add dependencies to the list of dependencies
for dep in depends:
dependencies.append((pkg, dep))
# Recurse into the dependencies
for dep in depends:
newdeps = get_all_depends(dep)
if newdeps != None:
dependencies += newdeps
return dependencies
# The Graphviz "dot" utility doesn't like dashes in node names. So for
# node names, we strip all dashes.
def pkg_node_name(pkg):
return pkg.replace("-","")
# In full mode, start with the result of get_targets() to get the main
# targets and then use get_all_depends() for each individual target.
if mode == FULL_MODE:
targets = get_targets()
dependencies = []
allpkgs.append('all')
for tg in targets:
# Skip uninteresting targets
if tg == 'target-generic-issue' or \
tg == 'target-generic-getty-busybox' or \
tg == 'target-generic-do-remount-rw' or \
tg == 'target-finalize' or \
tg == 'erase-fakeroots' or \
tg == 'target-generic-hostname':
continue
dependencies.append(('all', tg))
deps = get_all_depends(tg)
if deps != None:
dependencies += deps
# In pkg mode, start directly with get_all_depends() on the requested
# package
elif mode == PKG_MODE:
dependencies = get_all_depends(rootpkg)
# Start printing the graph data
print "digraph G {"
# First, the dependencies. Usage of set allows to remove duplicated
# dependencies in the graph
for dep in set(dependencies):
print "%s -> %s" % (pkg_node_name(dep[0]), pkg_node_name(dep[1]))
# Then, the node attributes: color, style and label.
for pkg in allpkgs:
if pkg == 'all':
print "all [label = \"ALL\"]"
print "all [color=lightblue,style=filled]"
continue
print "%s [label = \"%s\"]" % (pkg_node_name(pkg), pkg)
if pkg in unknownpkgs:
print "%s [color=red,style=filled]" % pkg_node_name(pkg)
elif mode == PKG_MODE and pkg == rootpkg:
print "%s [color=lightblue,style=filled]" % pkg_node_name(rootpkg)
else:
print "%s [color=grey,style=filled]" % pkg_node_name(pkg)
print "}"
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